The correct option is D 0.0073, 0.0285
x = 620.5
y = 24.15
max. error in x, (δx)=0.05
probable error in x,(ex)=±0.025
max. error in y,(δy)=0.005
probable error in y, (ey)=±0.0025
Maximum error in s
δs=1yδx+xy2δy
δs=0.0524.15+620.5(24.15)2×0.005
δs=0.002+0.0053
δs=0.0073
Probable error,
es=s×√(exx)2+(eyy)2
es=(620.524.15)×√(0.025620.5)2+(0.002524.15)2
es=0.00285